Facebook is going public, but what is it really worth? This interactive calculator is a basic two-step discounted cash flow model to help illustrate how variations in key assumptions can change the potential market value and share price of an IPO.

Enter your projections for Facebook’s sales growth, ebitda margin, and capex-to-sales ratio to see how these key assumptions affect the potential market value of the social networking firm’s offering.

The latest generation to enter the UK labour market is doing no better than those that came before, while living standards among people of retirement age are much higher than their forebears’, this interactive graphic of new FT research shows.

This chart shows the median disposable income of UK households, grouped by the age of the head of the household in ten-year cohorts. It is based on data from the Family Expenditure Survey and the Family Resources Survey that have been collected since the 1960s. These datasets, which underpin the government’s official poverty and inequality figures, containing household income information on over 730,000 households collected between 1961 and 2009-10.

The FT’s initial analysis of the Boundary Commission for Scotland proposal (which can also be seen on our interactive map) suggests both Coalition parties are likely to lose out, with the only Scottish Tory and three of the 11 current Scottish Liberal Democrat MPs likely to lose their seats as a result of the boundary changes.

Rather than waiting for requests under the FOI regime, the coalition Government has committed to releasing this basic spending information proactively, in a format that allows scrutiny by anyone with the necessary time, software and skills.

This morning’s data release will be repeated each month, and from January, local government bodies will have to release similar datasets accounting for all transactions above £500.

Some of the frustrations with analysing public data to which journalists have become accustomed were absent. There were no files released as locked PDF documents that are difficult to import into database software, for example.

While each department’s monthly spending was released as a separate spreadsheet document, these were formatted in a consistent structure across departments, thanks to detailed Treasury guidance on how to release the data.